What is the npr$,$ irr, arr and non discount payback period for the following example

Purchase two new delivery trucks for $$2,235,000.$ Annual maintenance costs are estimated at $$195,000$ for the first year and grow at $5\mathrm{.}50\%$ p$.$a$.$ for the remainder of the four$-$year life of this project. At the end of four years, it is expected the vehicles could be sold for $$900,000.$ It is also estimated that this option will increase sales by $14\mathrm{.}65\%$ starting in year $1,$ and then continue to grow at that rate until the end of the project and then no more. The current revenues $($year $0)$ of Big Leaver are $$1,975,000.$ The risk associated with this option is relatively high, so the project has been assigned a discount rate of $13\mathrm{.}30\%$